发明授权
US4537720A N-substituted-2-(R)-(sulfinic acid)-3-(S)-(acylamino)-4-oxo-azetidines and process 失效
N-取代-2-(R) - (亚磺酸)-3-(S) - (酰基氨基)-4-氧代 - 氮杂环丁烷和方法

N-substituted-2-(R)-(sulfinic acid)-3-(S)-(acylamino)-4-oxo-azetidines
and process
摘要:
N-substituted-2-(R)-(sulfinic acid)-3-(S)-(acylamino)-4-oxo-azetidines, which are useful as intermediates in 1-oxa .beta.-lactam antibiotics, are synthesized by electrolytic reduction of 7-(S)-acylamino-3-hydroxymethyl-3-cephem-4-carboxylic acid compounds.
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